Drier



v Feb. 24. 1925. 1,527,192

J. JUDELSON I DRIER Filed Jam], 1921 3 Sheets-Sheet 1 A TTORNEY Feb. 24. 1925. I 1,527,192 J. JUDELSON DRIER Filed Jan 7,' 1921 3 Sheets-Sheet 2 W T/V657 INVENTOR 0f, JUL/us JUDELSON A TTORNEY Feb. 24. 1 925.

J. JUDELSON DRIER 3 Shets-Sheet 5 i Filed Jan. 7, 1921 IN VEN TOR J0; ms Jana 501v ATTORNEYv Patented Feb. 24, 1925.

UNITED STATES PATENT OFFICE.

JULIUS JUDELSON, OF NEW YORK, N. Y., ASSIGNOR '10 JUDELSO'N EVAPO-IDRYER' COR- PORATION, A CORPORATION OF NEW YORK..

DRIER.

Application filed January 7, 1921. Serial No. 485,708.

To all whom it our concern:

Be it known that genus J UDELSON, a citizen of the United States, and resident of the city of New York, in the county of Bronx and State of New York, has invented certain new and useful Improvements in Driers, of which the following is a specification.

. This invention relates to drying appa ratus for abstracting moisture from materials to be dried and in which the drying is accomplished by a heat vehicle such as heated air which is circulated into contact with the layers of the material. K

In driers of this type, where the heated drying medium is brought into contact successively with the layers of the material to be dried, there is a reduction in temperature 7 of the medium after some of the moisture has been absorbed by it which leaves the latter greatly reduced in its eflectiveness for further drying purposes. The moisture containing medium must therefore either be.

- discharged from the drier or if it is to be used further efi'ectively, it must bereheated after each successive contact with each of the layers of the material. In either event, there is a considerableloss of efliciency resulting either from the total wastage of ower due to discharge of the dead drying medium which of course still has quite some heatenergy, or from the unwarranted extra amount of heat energy that must be su plied where the reheating must be repeate after successive contact with each layer of the material and isapplied to a moisture containing used medium.

One. ob'ect, therefore, of this invention is to provi e a drier of the type described characterized by efliciency of economy of power to a high degree.

Another object is to provide a drier of the type described with means for removing a large percentage of the moisture with a portion of the medium exhausted. after its contact with the material and propelling the remaining portion of saidmedium back to the supply end of the drier for reheating and then into repeated contact with the ma- .terial.

A still further'object is to provide a drier in the form of a self-contained unit having propelling means for circulating the drying operation and medium through the drying chamber continuously and for reconditioning the inoist drying medium.

Another object is to provide. a drier of the type described in which a substantially constant temperature is maintained throughout the entire drying chamber, and the drying medium simultaneously circulated into contact with all the layers of the material to be dried.

Other objects of this invention will be in part obvious and in part hereinafter pointed out. i

, The invention accordingly consists in the features of construction, combinations of elements and arrangement of parts which will be exemplified in the copstruction hereinafter described and of which the sec e of application will be indicated, in the followin claims.

n the accompanying drawing in which is shown one of various possible Illustrative embodiments of this invention,

- Fig; 1 is a longitudinal cross-sectional view of an evaporator 1 embodying this invention;

Fig. 2 is a transverse cross-sectional view thereof out along line 2-2 of Fig.1;

Fig. 3 is a view of the drier with the end wall of the casing removed and parts broken away to expose the means for exhausting -and f0r recirculating the drying medium;

Fig. 4 is an enlarged fragmentary detail view showin the louvers through which'the moisture la endrying medium is drawn;

and

-Fig. 5 is a perspective View of the fan employed' for drawing the drying medium through the drying chamber and for propelling-it back into circulation and exhaust- 111 same.

eferrin'g to the drawing, 10 indicates a casing preferably of double-walled construction so as to'include heat insulating air spaces 11 for preventing loss of heat from the interior of the drier. The casing 10, is provided at one end with a passage 12 into which is. supplied air or any other suitable vehicle through a conduit 13 which is suitably connected to a blower 14 of suitable type and which is secured preferably to the top of the casing as shown, by means such as bolts 15. Located preferably in the passage I 24 suit-ably mounted on a she 12 is a heating device such, as the steam pipes 16 (shown diagrammatically) for preheating the air supplied to the passage to any desired temperature. On the interior of the casing and occupying substantially a" ber 17 and down into the supply end of theevaporator and terminating at and communicating with the chamber, 18- as shown at23. .f

Located in the return passa' 21 is a fan 25 adapted to be driven by a' motor (notjshown). The planes of the vanes 26 of the fan do not pass throu h the axis ofthe fan shaft but are turns at various 'angies theretoas shown by the shading in Figs I from the bottom of the passage-21 is an exhaust flue '27 provided with a ;.damper' device 28. Beneath the fan 24 is provided a triangular ventin device-or louvers 29. com? prising metal stnpsfBO, angular'l. adjacent each other "as show'niin I \"iding tween their bent em ep ni gS- passage with t e f the flue jy. g

end and is-provi'ded at eaoh'endwith' su portmg' I inner. 1'.

P p ofthe' blower. 14 should be such thatthe ressure imparted tothe return drying meport 35 are secured angle'eirons 3,6 which serve to s11 port?v placed the yers 0f material 'to' be dried Secured to theputer sup pieces 38 ha" horizo stantially par el'tjo the st; 40 of the angle iois sub passageways 415-41"" .oppo sitely disposed in each end .of'u'the drying chamber and through which a draft is created across" trays 37. I

Y coils 16 is heated to any desired temperature and thenpasses fromthe bottom of the passage v r 7 into the drying chamberi'17 through the opening 41 as indicated b the arrows in full lines. It will bejno that in passing into the. air chamber 17 the drying medium I Whole drying G 1 and 3. I Opening disposed ssite formmgmthe sides of the triangle and pro-"F trays 37.1 onwhich are p g flin irons and "extending there; between these members39 and 40 to form Y. device will now be' from the outside 12 into thbhamber'lS andfve'nts' and lower surface of the layers of moist.

material. Furthermore, all of the trays are simultaneously subjected to the action of .the drying medium by reason of the fact that from the point of distribution at 19 the drying-medium rises into the passage 18 and simultaneously distributes itself through the oplenings'al, throughout the amber 17. Simu taneously with the operation. of the blower 14 for the supply of air, revolved in the direction shown by the feathered arrow in Fig. 3. The 0 ration of the fan creates a suctionor dra acro$ the chamber 17 anddraws the drying medium out, through the assageway l'fias shown by the arrows in ull lines in Fig. 1'.

This heating medium is passed under and above the trays and absorbs part of 'the the fan 24' is operated and moisturerfromthe material tobe dried and is drawn into thepassage 21. I The fan 21 in the passage '21 aidsin'drawing the dry: ing-medium at a j'eompa'ra'tively rapid rate through the ,comgfrtment .17 and simulp e moisture laden drying. mdium drawn into the pasage 21 "down-7;,

taneously forces- Wardly through the vent 29 into thefeichaust flue-'27,. and upwardly to .be' frecirculated "through'the "return flues '22. l -fIt has been foundgin the-actual operatio'n'bf drie'rs em} I through which the passage 2.1.?0omiminic'altefs'' jltha't returned for recirculation above the through the s 'ace .f32 at thefibottom of the 1 the co-action' of the variousgfelements willigbe sufiicient to" reeirculate the atter-against the returned drying medium is propelled through the fines and past the reheating steamcoils 20 whereby 'suflicient. heat is supplied to said medium to compensate it for the reduction in temperature resulting "fromdts passage through the' chamber 17 and. contacting with the moist materials.

At the co-terminus 19 the return drying medium which has now been reheated mixes with the fresh supplyiand isagain uniformly and simultaneously circulated over and below all of the trays 37. It will/be noted that the fresh supply of air and the return drying medium in part again pass .bv the reheater'20 in rising in the passage 1 8. Thisinsures a heated drying medium of a definite temperature to'be supplied in the drying chamber 17 andhas the farther advantage that these trays that are farther ingi-jthis invention that thedryin'g me-" .the apparatusandtheir arrangement be: rtion of ressure with which the h' ir-is'supplie by the blower 14. The

fbeingexhausted beneath the fan 24 true as those near the her and closer to the terminus 19; for it removed from the bottom of the drying chamber and from the supply or delivery terminus 19will be acted upon by a drying medium of substantiall the same temperaottom of the chamwill of course be understood that the trays in the lower portion of the chamber being close to the delivery or supply end of the heating medium receive the drying medium directly while a little time elapses before the medium has risen to the upper trays. Whatever the temperature loss in the interval may be, the loss is compensated for by the fact that the medium in rising up into the chamber 18 at the same time passes over the reheater 20. In this way, this reheater aids in maintaining a substantially constant temperature throughout the whole drying chamber.

It will thus be seen that there is provided apparatus in which the several objects of this invention are achieved and which is well adapted to meet'the needs of practical use.

Of course, any heating device may be employed, such for example as electric heating coils, gas burners and any heat vehicle. In place of air any other heat vehicle such as other gases may be used.

As various possible embodiments might be made of the above invention and as various changes might be made in the embodiment above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent.

l. Inan evaporator, the combination of .a compartment, a plurality of supporting members in said compartment for supporting materials to be dried and spaced vertically adjacent each other, means for heating a drying medium to a desired temperature, means for circulating said drying medium across said compartment, and means positioned adjacent the ends of the supporting members for deflecting said dry ing medium to circulate in one direction above and below each of said supporting members.

2. In an evaporator, the combination of a compartment, a plurality of'supporting members in said compartment for support ing materials to be dried and spaced vertically adjacent each other, means for heating a drying medium to a desired tempera ture,'; means for circulating said' drying medium across said compartment, and means for deflecting said drying medium to circulate in one direction above and below said supporting members, said last mentioned means comprising vertically spaced baflies positioned adjacent the ends of the supporting members.

3. In an evaporator, the combination of a compartment, supporting elements in said compartment spaced vertically from each other for supporting materials to be dried, means for heating a drying medium'to a desired temperature, means for circulating said medium through said compartment, the Walls of said compartment having aligned openings therein adjacent said supporting members Wherethrough the drying medium may flow into and out of the compartment and vertically spaced baflies disposed at said openings for dividing the drying medium so .as to circulate across said compartment above and below each of said supporting elements.

4. In an apparatus of the class described, a drying chamber, means for delivering a preheated drying medium at one end thereof, said means including a heater member in the path of a drying medium; another heater member spaced from said-firshmentioned heater member, and a return flue at the otherend of the chamber for returning said drying medium to the delivery end of the chamber and having a conduit extending between said heater members.

5. In an apparatus of the class described, a drying chamber,-means' for delivering a. pre-heated drying medium at one end thereof, said means including a heater member in the path of a drying medium; another heater member spaced from said first-mentioned heater member and a return flue at the other end of the chamber for returning said drying medium to the delivery end of the chamber and having a conduit extending between said heater members, said conduit having a delivery orifice at the lowerend thereof in communication with said means for delivering, the preheated drying. medium. I

6. In an evaporator, a drying chamber. a delivery compartment adjacent one end of said drying chamber and communicating therewith, anexhaust compartment adjacent the opposite end of said drying chamher and communicating therewith, a plurality of spaced heaters in said delivery compartment,- means for supplying a drying medium to said delivery compartment and adapted to bring said drying medium into contact with one of said heater members. means for circulating said drying medium across said drying chamber, including suction means in said exhaust compartment, and a return flue in communication with said exhaust compartment for returning the drying medium .to the delivery compartment. said fiue having a conduit member extending between said heater members and having an orifice at the lower end therea ing suction means in said exhaust coinparta of in communication with said drying com partment. 7. In an evaporator, a delivery com artment adjacent one on of said drying c amber and communicating therewith, an exhaust com' artment a drying chamber her and communicating therewith, a 'p r 'ralityof spaced heaters in said {dehfery compartment, means for supplying, a dry ing medium to said delive "compartment and adapted tobring said ryin'gmedium into contact with one of said heater mom 1 said dryin hers, means for circulatin V amber, nclu medium across said, drying c ment, a return flue in communication with said exhaust compartment'for returning the drying medium to the-fdeliverycompartment, said flue havin extending between sai having an orifice at partment, and an exhaushflue communicating with the lower endfof 'said exhaust compartment. I a 1 8. In an evaporator, a drying chambeif, ,aplurality of vertically spaced supportmg said chamber-having vertica ly spaced openings therein adjacent said-supporting members, he openings in "said walls'heing..1n

horizontal alignment with Teachother, a delivery compartment adjacent one of 'said walls andin communication with the drying chamber through the openings in; said' 'wal an exhaust compartment adjacent the other 'wall and in communication with vthe drying chamberthrough the openings in said last mentioned wall, a heater member. located in said drying compartment, means forsupply medium through said drying chamber, an vertically spaced baflles disposed adjacent said aligned openings for dividing said dry-j ing medium so as to circulate. above and below said supporting members.

9; In an evaporator, a drying chamber, a plurality of vertically spaced supporting members in said chamber for supporting materials tobe dried, two opposed walls of. said chamber having vertically spaced openings therein adjacent said su porting members, the openings in said wal s being in horizontal alignment with each other, a delivery compartment adjacent one of said walls and in communication with the drying chamber through the openings in said wall, an exhaust compartment adjacent the other wall and in communication with the drying chamber through the openings in said last mentioned wall, a heater member located in said drying compartment, means for supplyad acent the opposite end of sai drying ha for circulating the dpying medium including awconduit member heater-members and the I lQWQ i .end thereof, in communication. with'said -drying comdelivery opening dis suction means in sai exhaust compartment and a return flue in communication with said exhaust compartment at one end and with said end? '10; Inan apparatus of the class described, v a compartment, a plurality of supports for materials to be dried therein, arran ed verf'tically one above the other, means or an plying a preheated dryingmedium, inclu inga supply conduit having a delivery opening,the wall of said compartment having assageways in communication with said devefy opening disposed adjacent said supports,iand means or drawin' said drying medium through said aligne passageways iabove. and below each of said supports in {one-direction.

,11.' In an, apparatusof the class described, a' compartment, aplurality of supports for for supporting.

materlals to be dried therein arran ed vertitfally. one above-the other, means or supplying apreheated drying medium, including a supply conduit having a delivery opening.'-the wall of said compartment having passageways in communication with said desed adjacent said sup orts, means for rawing said drying diam throu b said assageways above and-below eac of sai su ports in one --;;n i"rnon, a return flue having a delivery ommunication with said conduit aw y- 9 m .ti'ief drying .medi mg a drying medium to said del very momher, and means for circulating said dryin "through said delivery openings; i I I v I 12. 'In an apparatus of the-class described,

andumeans for propelling um issuing from the comanmamwma throughsaid vflue to recirculated through the. compartment a com artment a plurality of supports for materi dls to be dried'therein arranged vertically one above the other,"'means for supplying a preheated drying medium to said compartment, an intake conduit having a delivery or supply opening, adjacent the bottom of said compartment and a heating devicedisposed in the path of said drying medium; as it issues/from said delivery opening whereby the heating medium is further heated ment. g, a

13; In an apparatus of the character described, a compartment for drying material therein, and means for supplying an efiectively conditioned drying medium of pre determined properties to said compartment and for passing the drying medium across the'compartment in one direction above and as it rises into said compartdelivery compartment at the other ill) I to all therein,

' al therein,

below the material to be dried, said means being arranged to recondition the drying medium to its initial predetermined effective state after each passagethrough said compartment and to reintroduce the reconditioned medium into effective circulation.

14;. In an apparatus of the character described, a compartment for drying material and means for supplying an effectively conditioned drying medium of predetermined properties to said compartment and for passing the drying medium across the compartment in one direction above and below the material to be dried, said means being arranged to recondition the drying medium to its initial predetermined effective state after each passage through said compartment and to reintroduce the reconditioned medium into effective circulation,

said means including two complete circu-' lating systems co-operatively interconnected.

In an apparatus of the character described, a compartment for drying material therein, and means for supplying a uniform and effectively conditioned drying medium of predetermined properties simultaneously passing said medium across the compartment in one direction above and below the material to be dried, said recondition the drying medium after each passage through the compartment.

16. In an apparatus of the character described, a compartment for drying, material therein, means for supplying an effectively conditioned drying medium of predetermined properties to 'said compartment and for passing the drying medium across the compartment in one direction above and below the material to be dried at a relatively high velocity, said means including a forced circulating system and an inducedvcirculating system co-operatively interconnected.-

17. In an apparatus of the character described, a compartment for drying materimeans for'drawing a drying meparts of said compartmentand formeans serving to dium at a relatively high velocity through the compartment and for simultaneously forcinga moisture laden portion of the drying medium drawn from said compartment to be exhausted and another portion thereof to be recirculated through said compartment.

18. In an apparatus of the character described, a compartment for drying material therein, means for drawihg a drying mediumat a relatively high velocity through the compartment and for simultaneously. forcing a moisture laden portion of the drying medium drawn from said compartment downwardly to be exhausted, and another portion thereof upwardly to be recirculated through-said compartment.

19. Inanlapparatus of the character described, a compartment for drying material therein, means for drawing a drying mediumat a relatively high velocity through the compartment, said compartment having a passage into which the drying medium is drawn after passing through said compartment, and a, fan in said passage for simultaneously forcing a moisture laden portion of the drying medium in the passage to be exhausted and another portion thereof to be recirculated through said compartment.

20. In an apparatus of the character described, a compartment for drying material therein, means for drawing a drying medium at a relatively high velocity through the compartment, said compartment having a passage into which the drying medium is drawn after passing through said compartment, a fan in the passage, an exhaust vent extending from the passage on one side of the fan, and a recirculating flue extending from the passage from the opposite side of the. fan.

Signed at New York city, in the county of New York and State of New York this 30th day of December A. D. 1920. 

